[Asterisk-Users] processor limits of max concurrent users on a single system

[mattf]

Hello,

I am trying to figure out the maximum capacity of concurrent SIP users(SIP
to Zap T1 channels) on my asterisk system. I assume that the processor/RAM
is the weakest link in the chain in terms of capacity right now.

* see my configuration below

Right now with 18 concurrent users on SIP phones going out through Zaptel T1
channels I get an average of a 0.30 load average and 25% of my total RAM is
in use. One of the things I noticed is that the 1 second load average may
spike up to 0.90 and then go back down to 0.10 and the CPU idle will go from
100% to 0% every few seconds. I never have any iowait so I know nothing is
getting backlogged.

With my current equipment in this machine could I conclude that I can
reliably expect to have 60 cuncurrent SIP-to-Zap users on my system?


Configuration:
Asus 800MHz bus Motherboard
P4 2.8GHz with 800MHz bus
2GB DDR400 RAM
SCSI RAID 10 (4 drives mirrored and spanned)
one Digium T400 card
3 T1s plugged in
RedHat linux 9
no Xwindows or unnecessary services running


Any help would be appreciated,

MATT---